EP1537647B1 - Temperaturüberwachung parallelgeschalteter wechselrichtermodule - Google Patents

Temperaturüberwachung parallelgeschalteter wechselrichtermodule Download PDF

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Publication number
EP1537647B1
EP1537647B1 EP04734850.3A EP04734850A EP1537647B1 EP 1537647 B1 EP1537647 B1 EP 1537647B1 EP 04734850 A EP04734850 A EP 04734850A EP 1537647 B1 EP1537647 B1 EP 1537647B1
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EP
European Patent Office
Prior art keywords
temperature
parallel
output phase
inverter
modules
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP04734850.3A
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English (en)
French (fr)
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EP1537647A1 (de
Inventor
Simo PÖYHÖNEN
Osmo Pasuri
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ABB Technology Oy
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ABB Technology Oy
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/493—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1203—Circuits independent of the type of conversion
    • H02H7/1206—Circuits independent of the type of conversion specially adapted to conversion cells composed of a plurality of parallel or serial connected elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection

Definitions

  • the invention relates to a method in connection with parallel-connected inverter modules, disclosed in the preamble of claim 1, and to an arrangement in connection with parallel-connected inverter modules, disclosed in the preamble of claim 5.
  • Inverters are used in frequency converters to generate a desired voltage or current to a load to be fed.
  • a frequency converter typically receives its supply voltage from an AC network. This voltage is rectified in a rectifier unit and further converted to alternating voltage in the inverter to control the load in a desired manner.
  • a conventional device fed from a frequency converter is a motor, which may be controlled in a reliable manner with the frequency converter using various control and adjustment principles.
  • Parallel-connection of inverter modules is typically achieved by connecting the same output phase of each parallel-connected module to a common phase supply.
  • the output phases of each inverter module are connected to the corresponding output phases of other inverter modules.
  • the switching instructions of the frequency converter are generated in a unit common to all the inverter modules, which unit then copies the instructions and sends them to each parallel-connected inverter module.
  • the number of parallel-connected modules may be anything from two upwards.
  • Inverter modules to be connected in parallel are typically fairly large and therefore placed in separate cabins. These cabins are cooled by blowing air into them to ensure proper operation and performance of the inverters.
  • Today the temperatures of inverter output phases are measured for example directly from a power component of the output phase, or from the immediate vicinity thereof. The measured temperature is compared with a fixed temperature limit and thus, if the temperature rises above the limit, an overload possibly caused to the component is detected.
  • Prior art component temperature control thus relies on a single temperature measurement, but with this measurement only an overload of the component in question can be concluded with certainty.
  • Other elements having an essential impact on the temperature of the switching component are properly functioning cooling and control of the switch component. Comparing the measured temperature with the fixed temperature limit does not, however, produce clear indication or diagnostic data of such disturbances that may occur.
  • Document EP 0444826 A2 discloses an inverter, in which over-current protection is implemented with temperature sensors.
  • the preferred embodiments of the invention are disclosed in the dependent claims.
  • the invention is based on the idea that temperature control of parallel inverter modules is carried out by comparing the temperatures of the same output phases of parallel modules with one another.
  • the method of the invention provides distinct advantages in fault diagnostics, because in addition to failure indications based, up to present, almost solely on an overload current, failures associated with cooling and with the operation of the control of the power component are now indicated.
  • the failures relating cooling that the invention is capable of detecting include decreased circulation of cooling air, soiling of the cooling components in power semiconductors, and partial or complete breakdown of the cooling fan.
  • the method enables to detect failures in control electronics, i.e. when one semiconductor component is controlled differently than others, and in power semiconductors, i.e. when a power semiconductor is not conducting or does so in an obscure manner.
  • the arrangement of the invention provides a simple means for attaining the advantages of the invention.
  • the Figure is a schematic example of parallel-connected three-phase inverter modules A, B, C. Although the Figure shows three inverter modules, their number is not restricted thereto, but a required number of parallel modules may be used. Likewise, the number of phases may vary depending on the purpose of use.
  • Output phases Au, Av, Aw, Bu, Bv, Bw, Cu, Cv, Cw of inverter modules A, B, C are interconnected to produce output u, v, w for the load.
  • the connection has been implemented by connecting the same phases Au, Bu, Cu; Av, Bv, Cv; Aw, Bw, Cw of each module A, B, C together.
  • temperature T Au , T Av , T Aw , T Bu , T Bv , T Bw , T Cu , T Cv , T Cw of each output phase of each inverter module is determined. This may be carried out in a conventional manner by direct temperature measurement. Many currently used power semiconductors have a built-in temperature measurement element that allows the temperature to be obtained directly from the semiconductor of the component or from the vicinity thereof. It is also possible to measure temperature from a cooling plate. In addition, it is possible to determine the temperature of components indirectly by calculating it on the basis of the current passing through the component.
  • each inverter module is compared with the temperatures of the same output phases of the other modules connected in parallel.
  • temperature T Au of phase u of module A is thus compared with temperatures T Bu , T Cu of phase u of modules B, C.
  • comparison means CM This is implemented as a cross-comparison between all the modules and, in accordance with the invention, carried out in comparison means CM.
  • each inverter module is connected with the comparison means by a signal connection At, Bt, Ct, respectively.
  • an alarm signal as is generated.
  • this alarm signal is generated by alarm signal means AM. It is apparent that means CM and AM may be implemented in a single circuitry, although in the Figure these means are separated by a signal line sl.
  • each phase temperature is compared, in accordance with the embodiment, with the average obtained and if the output phase temperature of one of the inverter modules differs from the average of corresponding output phase temperatures more than allowed by a predetermined limit, an alarm signal is generated.
  • the comparison is carried out by means CM configured for this purpose.
  • phase temperatures are further compared with the calculated average of the phase temperatures.
  • the method can be further simplified in accordance with the embodiment by selecting the highest temperature among the temperatures of parallel modules in each phase and by comparing this maximum value with the calculated average.
  • the alarm signal of the invention is generated by the means for generating an alarm signal in response to a signal of the means CM in signal line sl.
  • the alarm signal as may contain all possible known preventive precautions that aim at reducing the risk of any major failures in the equipment. Such precautions may include an alarm raised to the operator, interruption of the control of the inverter module in question, and possibly a controlled shutdown of the system as a whole.

Claims (6)

  1. Verfahren in Verbindung mit parallelgeschalteten Wechselrichtermodulen, wobei zwei oder mehr Wechselrichtermodule (A, B, C) parallelgeschaltet sind, um dieselbe Last zu speisen, wobei jedes Wechselrichtermodul (A, B, C) zwei oder mehr Ausgangsphasen (u, v, w) zum Einspeisen elektrischer Leistung in eine zwei- oder mehrphasige Last umfasst, wobei das Verfahren umfasst:
    Bestimmen der Temperatur (TAu, TAv, TAw, TBu, TBv, TBw, TCu, TCv, TCw) jeder Ausgangsphase (Au, Av, Aw, Bu, Bv, Bw, Cu, Cv, Cw) in jedem Wechselrichtermodul (A, B, C), dadurch gekennzeichnet, dass das Verfahren ferner die folgenden Schritte umfasst:
    Vergleichen der Temperatur jeder Ausgangsphase in jedem Wechselrichtermodul mit den Temperaturen derselben Ausgangsphase in den anderen parallelgeschalteten Modulen, und
    Erzeugen eines Alarmsignals, falls sich die Temperatur der Ausgangsphase in einem Wechselrichtermodul von den Temperaturen derselben Ausgangsphase der anderen Wechselrichtermodule mehr unterscheidet, als ein vorbestimmter Grenzwert erlaubt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Vergleich von Temperaturen die folgenden Schritte umfasst:
    Berechnen eines Mittelwertes (Tu_ave, Tv_ave, Tw_ave) der Temperaturen (TAu, TBu, TCu; TAv, TBv, TCv; TAw, TBw, TCw) einander entsprechender Ausgangsphasen paralleler Wechselrichtermodule (A, B, C),
    Vergleichen der Temperatur jeder Ausgangsphase jedes parallelen Wechselrichtermoduls mit der mittleren Temperatur einer entsprechenden Ausgangsphase; und
    Erzeugen eines Alarmsignals, falls sich die Temperatur der Ausgangsphase eines Wechselrichtermoduls von der mittleren Temperatur der entsprechenden Phase mehr unterscheidet, als ein vorbestimmter Grenzwert erlaubt.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Vergleich die Schritte des Auswählens des maximalen Wertes (Tu_max, Tv_max, Tw_max) der Temperaturen jeder Ausgangsphase in jedem parallelen Wechselrichtermodul und des Vergleichens dieses Wertes mit der mittleren Temperatur (Tu_ave, Tv_ave, Tw_ave) der entsprechenden Ausgangsphase umfasst.
  4. Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das Verfahren außerdem einen Schritt des Stoppens, in Reaktion auf ein Alarmsignal, wenigstens eines Wechselrichtermoduls (A, B, C) umfasst, das eine abweichende Temperatur an der Ausgangsphase aufweist.
  5. Anordnung in Verbindung mit parallelgeschalteten Wechselrichtermodulen, wobei zwei oder mehr Wechselrichtermodule (A, B, C) parallelgeschaltet sind, um dieselbe Last zu speisen, wobei jedes Wechselrichtermodul zwei oder mehr Ausgangsphasen (u, v, w) zum Zuführen elektrischer Leistung zu einer zwei- oder mehrphasigen Last umfasst, wobei die Anordnung umfasst:
    Temperaturbestimmungsmittel zum Bestimmen der Temperatur jeder Ausgangsphase (TAu, TAv, TAw, TBu, TBv, TBw, TCu, TCv, TCw) jedes Wechselrichtermoduls, dadurch gekennzeichnet, dass die Anordnung ferner umfasst:
    Vergleichsmittel (CM) zum Vergleichen der Temperatur jeder Ausgangsphase jedes Wechselrichtermoduls mit den Temperaturen der entsprechenden Ausgangsphasen anderer Module, die parallelgeschaltet sind, und
    Mittel (AM) zum Erzeugen eines Alarmsignals (as), falls sich die Ausgangsphasentemperatur eines der Wechselrichtermodule von den Temperaturen der entsprechenden Ausgangsphase der anderen Wechselrichtermodule mehr unterscheidet, als ein vorbestimmter Grenzwert erlaubt.
  6. Anordnung nach Anspruch 5, dadurch gekennzeichnet, dass die Anordnung ferner umfasst:
    Mittel (CM) zum Berechnen eines Mittelwertes von Temperaturen der einander entsprechenden parallelen Wechselrichtermodule, wobei die Vergleichsmittel dafür ausgelegt sind, die Temperatur jeder Ausgangsphase jedes parallelen Wechselrichtermoduls mit dem Temperaturmittelwert einer entsprechenden Ausgangsphase zu vergleichen.
EP04734850.3A 2003-05-28 2004-05-26 Temperaturüberwachung parallelgeschalteter wechselrichtermodule Not-in-force EP1537647B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20030809A FI115266B (fi) 2003-05-28 2003-05-28 Menetelmä ja järjestely rinnankytkettyjen inverttimoduulien yhteydessä
FI20030809 2003-05-28
PCT/FI2004/000321 WO2004107550A1 (en) 2003-05-28 2004-05-26 Temperature monitoring of parallel-connected inverter modules

Publications (2)

Publication Number Publication Date
EP1537647A1 EP1537647A1 (de) 2005-06-08
EP1537647B1 true EP1537647B1 (de) 2017-07-05

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EP04734850.3A Not-in-force EP1537647B1 (de) 2003-05-28 2004-05-26 Temperaturüberwachung parallelgeschalteter wechselrichtermodule

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EP (1) EP1537647B1 (de)
CN (1) CN100472932C (de)
FI (1) FI115266B (de)
WO (1) WO2004107550A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019106257A1 (de) * 2019-03-12 2020-09-17 Sma Solar Technology Ag Batterie-Wechselrichtersystem
WO2022199956A1 (de) * 2021-03-26 2022-09-29 Siemens Aktiengesellschaft Temperaturüberwachung für schaltanlagen
WO2022200279A1 (de) * 2021-03-26 2022-09-29 Siemens Aktiengesellschaft Temperaturüberwachung für schaltanlagen

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1973025B1 (de) 2007-03-22 2009-11-25 Baumüller Nürnberg Gmbh Temperaturüberwachung bei Leistungsschaltern
EP2211454A1 (de) 2009-01-27 2010-07-28 Abb Oy Lastausgleich für parallel angeschlossene Umrichtermodule
DE102011076908A1 (de) * 2011-06-01 2012-12-06 Robert Bosch Gmbh Verfahren zum Betreiben eines Wechselrichters sowie Wechselrichter
DE102012218067A1 (de) * 2012-10-02 2014-04-03 Wobben Properties Gmbh Verfahren zum Überwachen mehrerer elektrischer Energieleitungen eines Leitungsstrangs
CN110265974B (zh) * 2019-06-29 2021-04-16 潍柴动力股份有限公司 温度检测方法及装置

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US5493154A (en) * 1993-04-21 1996-02-20 Astec International, Ltd. Temperature share scheme

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JP2811872B2 (ja) * 1990-02-26 1998-10-15 富士電機株式会社 半導体装置の保護回路
JPH07154976A (ja) * 1993-11-30 1995-06-16 Fuji Electric Co Ltd インバータ冷却ファンの運転方法
JPH07194094A (ja) * 1993-12-28 1995-07-28 Toyota Motor Corp スイッチング素子の温度異常検出装置およびスイッチング素子保護装置
US5905645A (en) * 1996-12-02 1999-05-18 Astec International Limited Thermally aided power sharing of power supplies with or without an external current share line
JP3198991B2 (ja) * 1997-08-01 2001-08-13 株式会社豊田自動織機製作所 Ｄｃ−ａｃインバータの駆動方法及びｄｃ−ａｃインバータの温度保護回路

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5493154A (en) * 1993-04-21 1996-02-20 Astec International, Ltd. Temperature share scheme

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019106257A1 (de) * 2019-03-12 2020-09-17 Sma Solar Technology Ag Batterie-Wechselrichtersystem
US11770004B2 (en) 2019-03-12 2023-09-26 Sma Solar Technology Ag Battery inverter system
WO2022199956A1 (de) * 2021-03-26 2022-09-29 Siemens Aktiengesellschaft Temperaturüberwachung für schaltanlagen
WO2022200279A1 (de) * 2021-03-26 2022-09-29 Siemens Aktiengesellschaft Temperaturüberwachung für schaltanlagen

Also Published As

Publication number Publication date
FI20030809A (fi) 2004-11-29
CN1698258A (zh) 2005-11-16
EP1537647A1 (de) 2005-06-08
FI115266B (fi) 2005-03-31
WO2004107550A1 (en) 2004-12-09
FI20030809A0 (fi) 2003-05-28
CN100472932C (zh) 2009-03-25

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